Im a professional pilot, and i do wear mechanical swiss watches all the time, specially my IWC Big Pilot, Breitling Navitimer, Chronomat and the Zenith Pilot. A reliable watch is a need for any pilot (since flights are always schedule-based). But to wear a expensive swiss watch, is a matter of style and affordability. Since im from a family of pilots for generations, the pilot's watch is like a heritage to us. The watch is the pilot's jewel (since the pioneers like S.Dumont, Louie Blériot, until the famous pilots like John Travolta, the Red Bull Racer pilots, the astronauts...those distinguished pilots always wears a good watch). But since a jewel is just a matter of looks (and affordability) my coleagues pilots wear mostly citizens brand and other watches (beause the luxury swiss watches are too expensive). But they always wear some good (dependable) watch.